BS 6759-1:1984
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Safety valves Specification for safety valves for steam and hot water
Hardcopy , PDF
18-05-2004
English
29-02-1984
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
Section two. Material requirements and limitations
3. Pressure containing components
4. Body seat faces and valve disk faces
5. Safety valve springs
6. Bolting for pressure containing joints
Section three. Design and construction
7. General
8. Scantlings
9. Castings
10. Forgings
11. Springs
Section four. Production testing and inspection
12. General
13. Safety precautions
14. Test media
15. Hydraulic test
Section five. Marking
16. Body marking
17. Identification plate
Section six. Performance testing
18. Type testing of safety valves for operating and
flow characteristics using water, steam, air or
other gas
19. Tests to determine operating characteristics
20. Tests to determine flow characteristics
21. Determination of coefficient of discharge and
certified discharge capacity
Section seven. Safety valves for boilers, superheaters,
reheaters and economizers
22. Boilers and superheaters
23. Reheaters and superheaters separated from the
boiler
24. Safety valves for economizers
25. Operating margins
Appendices
A. Derivation of superheat correction factors
B. Guidance on safety valve mounting
C. Inspection and testing facilities
Tables
1. Helical coil spring materials and mechanical
properties
2. Minimum duration of hydraulic shell test
3. Values of C relative to values of k
4. Capacity correction factors for back pressure (Kb)
5. Superheat correction factor KSh
Figures
1. Illustration of area definitions
2. Graph for value of constant K, the safety valve
spring correction factor
3. Compression factor Z as a function of reduced
pressure pr and reduced temperature Tr
Specifies requirements for safety valves for boiler installations and associated pipework where the steam pressure exceeds 1 bar gauge or, in the case of hot water boilers, where the rating is 44 kW and above.
| Committee |
PSE/18/6
|
| DevelopmentNote |
REPLACES BS 759: PART 2: 1975
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| ISO 4126:1981 | Similar to |
| PD 5500:2000 | SPECIFICATION FOR UNFIRED FUSION WELDED PRESSURE VESSELS |
| 03/310868 DC : DRAFT JUNE 2003 | BS 6644 - SPECIFICATION FOR INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70KW (NET) AND 2MW (GROSS) (2ND AND 3RD FAMILY GASES) |
| BS 2646-1:1988 | Autoclaves for sterilization in laboratories Specification for design and construction |
| BS 2790:1992 | Specification for design and manufacture of shell boilers of welded construction |
| BS 779:1989 | Specification for cast iron boilers for central heating and indirect hot water supply (rated output 44 kW and above) |
| BS 6644:1991 | Specification for installation of gas-fired hot water boilers of rated inputs between 60 kW and 2 MW (2nd and 3rd family gases) |
| BS 1894:1992 | Specification for design and manufacture of electric boilers of welded construction |
| BS 3970-1:1990 | Sterilizing and disinfecting equipment for medical products Specification for general requirements |
| BS 1113:1989 | Specification for design and manufacture of water-tube steam generating plant (including superheaters, reheaters and steel tube economizers) |
| BS 1113:1992 | Specification for design and manufacture of water-tube steam generating plant (including superheaters, reheaters and steel tube economizers) |
| BS 2790:1989 | Specification for design and manufacture of shell boilers of welded construction |
| BS 5258-1:1986 | Safety of domestic gas appliances Specification for central heating boilers and circulators |
| BS 855:1990 | Specification for welded steel boilers for central heating and indirect hot water supply (rated output 44 kW to 3 MW) |
| BS 806:1990 | Specification for design and construction of ferrous piping installations for and in connection with land boilers |
| BS 806:1993 | Specification for design and construction of ferrous piping installations for and in connection with land boilers |
| BS 6644:1990 | Specification for installation of gas-fired hot water boilers of rated inputs between 60 kW and 2 MW (2nd and 3rd family gases) |
| BS 6798:2000 | Specification for installation of gas-fired boilers of rated input not exceeding 70 kW net |
| BS 853-2:1996 | Specification for vessels for use in heating systems Tubular heat exchangers and storage vessels for building and industrial services |
| BS 6759-3:1984 | Safety valves Specification for safety valves for process fluids |
| 02/710149 DC : 0 | PD 2790 - SPECIFICATION FOR THE DESIGN AND MANUFACTURE OF SHELL BOILERS |
| BS 5500:1991 | Specification for unfired fusion welded pressure vessels |
| BS 6798:1987 | Specification for installation of gas-fired hot water boilers of rated input not exceeding 60 kW |
| BS 3970-4:1990 | Sterilizing and disinfecting equipment for medical products Specification for transportable steam sterilizers for unwrapped instruments and utensils |
| BS 5258-15:1990 | Safety of domestic gas appliances Specification for combination boilers |
| BS 6739:1986 | Code of practice for instrumentation in process control systems: installation design and practice |
| BS 853(1990) : 1990 AMD 8979 | SPECIFICATION FOR VESSELS FOR USE IN HEATING SYSTEMS - CALORIFIERS AND STORAGE VESSELS FOR CENTRAL HEATING AND HOT WATER SUPPLY |
| BS 853-1(1996) : 1996 | SPECIFICATION FOR VESSELS FOR USE IN HEATING SYSTEMS - CALORIFIERS AND STORAGE VESSELS FOR CENTRAL HEATING AND HOT WATER SUPPLY |
| BS 2745-1:1993 | Washer-disinfectors for medical purposes Specification for general requirements |
| BS 6644:1986 | Specification for installation of gas-fired hot water boilers of rated inputs between 60 kW and 2 MW (2nd and 3rd family gases) |
| BS PAS 33(1999) : 1999 | SPECIFICATION FOR THE DESIGN, INSTALLATION AND COMMISSIONING OF GAS FIRED CENTRAL HEATING SYSTEMS IN DOMESTIC PREMISES |
| BS 759-1:1984 | Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connection with boilers Specification for valves, mountings and fittings |
| BS 2646-1:1993 | Autoclaves for sterilization in laboratories Specification for design, construction, safety and performance |
| ISO 4126:1981 | Safety valves — General requirements |
| BS 1560-2:1970 | Circular flanges for pipes, valves and fittings (Class designated) Specification for steel pipe flanges (nominal sizes ½ in to 24 in). Metric dimensions |
| BS 970-5:1972 | Specification for wrought steels in the form of blooms, billets, bars and forgings Carbon and alloy spring steels for the manufacture of hot formed springs |
| BS 759-1:1984 | Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connection with boilers Specification for valves, mountings and fittings |
| BS 2693-1:1956 | Specification for screwed studs General purpose studs |
| BS 1726-1:1987 | Coil springs. Guide for the design of helical compression springs |
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